i just say "I" believe quietly, so my voice gets lost in the crowd, as well as "And with your spirit" or "Et cum Spiritu Tuo" etc... "...my sould shall be healed" I remember when i was young they just started giving communion in the hand et. al. and people just did it. Well why can't we just quietly say the real translation to ourselves. At the end of mass i always say Deo Gratias quietly too. I started doing it when the priests and lay people were replacing all of the references to the "Father" with "God."
I go to a Latin Mass, so its not much of a problem for me.